Effect of combination of ultraviolet radiation and biocide on fungal-induced corrosion of high-strength 7075 aluminum alloy

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Transactions of Nonferrous Metals Society of China Pub Date : 2024-09-01 DOI:10.1016/S1003-6326(24)66576-3

Zheng-yu JIN , Chao WANG , Hai-xian LIU, Hong-wei LIU

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Abstract

The effect of ultraviolet (UV) radiation and biocide benzalkonium chloride (BKC) on fungal-induced corrosion of AA7075 induced by Aspergillus terreus (A. terreus) was deeply studied using analysis of biological activity, surface analysis, and electrochemical measurements. Results demonstrated that the planktonic and sessile spore concentrations decline by more than two orders of magnitude when UV radiation and BKC are combinedly used compared with the control. UV radiation can inhibit the biological activity of A. terreus and influence the stability of passive film of AA7075. Except for direct disinfection, the physical adsorption of BKC on the specimen can effectively inhibit the attachment of A. terreus. The combination of UV radiation and BKC can much more effectively inhibit the corrosion of AA, especially pitting corrosion, due to their synergistic effect. The combined application of UV radiation and BKC can be a good method to effectively inhibit fungal-induced corrosion.

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紫外线辐射和杀菌剂组合对真菌诱导的高强度 7075 铝合金腐蚀的影响

采用生物活性分析、表面分析和电化学测量方法，深入研究了紫外线（UV）辐射和杀菌剂苯扎氯铵（BKC）对赤曲霉（A. terreus）诱导的 AA7075 真菌腐蚀的影响。结果表明，与对照组相比，紫外线辐射和 BKC 联合使用时，浮游孢子和无柄孢子的浓度下降了两个数量级以上。紫外线辐射可抑制赤霉菌的生物活性，并影响 AA7075 被动膜的稳定性。除直接消毒外，BKC 在试样上的物理吸附也能有效抑制赤霉菌的附着。由于紫外线辐射和 BKC 的协同作用，两者结合使用能更有效地抑制 AA 的腐蚀，尤其是点腐蚀。紫外线辐射和 BKC 的联合应用是一种有效抑制真菌引起的腐蚀的好方法。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.